// SPDX-License-Identifier: GPL-2.0
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/*
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* Support for GalaxyCore GC2235 2M camera sensor.
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*
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* Copyright (c) 2014 Intel Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/kmod.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/moduleparam.h>
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#include <media/v4l2-device.h>
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#include "../include/linux/atomisp_gmin_platform.h"
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#include <linux/acpi.h>
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#include <linux/io.h>
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#include "gc2235.h"
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/* i2c read/write stuff */
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static int gc2235_read_reg(struct i2c_client *client,
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u16 data_length, u16 reg, u16 *val)
|
{
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int err;
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struct i2c_msg msg[2];
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unsigned char data[6];
|
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if (!client->adapter) {
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dev_err(&client->dev, "%s error, no client->adapter\n",
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__func__);
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return -ENODEV;
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}
|
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if (data_length != GC2235_8BIT) {
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dev_err(&client->dev, "%s error, invalid data length\n",
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__func__);
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return -EINVAL;
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}
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memset(msg, 0, sizeof(msg));
|
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msg[0].addr = client->addr;
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msg[0].flags = 0;
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msg[0].len = 1;
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msg[0].buf = data;
|
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/* high byte goes out first */
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data[0] = (u8)(reg & 0xff);
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msg[1].addr = client->addr;
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msg[1].len = data_length;
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msg[1].flags = I2C_M_RD;
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msg[1].buf = data;
|
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err = i2c_transfer(client->adapter, msg, 2);
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if (err != 2) {
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if (err >= 0)
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err = -EIO;
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dev_err(&client->dev,
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"read from offset 0x%x error %d", reg, err);
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return err;
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}
|
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*val = 0;
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/* high byte comes first */
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if (data_length == GC2235_8BIT)
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*val = (u8)data[0];
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return 0;
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}
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static int gc2235_i2c_write(struct i2c_client *client, u16 len, u8 *data)
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{
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struct i2c_msg msg;
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const int num_msg = 1;
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int ret;
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msg.addr = client->addr;
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msg.flags = 0;
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msg.len = len;
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msg.buf = data;
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ret = i2c_transfer(client->adapter, &msg, 1);
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return ret == num_msg ? 0 : -EIO;
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}
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static int gc2235_write_reg(struct i2c_client *client, u16 data_length,
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u8 reg, u8 val)
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{
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int ret;
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unsigned char data[4] = {0};
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const u16 len = data_length + sizeof(u8); /* 16-bit address + data */
|
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if (data_length != GC2235_8BIT) {
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dev_err(&client->dev,
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"%s error, invalid data_length\n", __func__);
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return -EINVAL;
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}
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/* high byte goes out first */
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data[0] = reg;
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data[1] = val;
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ret = gc2235_i2c_write(client, len, data);
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if (ret)
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dev_err(&client->dev,
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"write error: wrote 0x%x to offset 0x%x error %d",
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val, reg, ret);
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return ret;
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}
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static int __gc2235_flush_reg_array(struct i2c_client *client,
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struct gc2235_write_ctrl *ctrl)
|
{
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u16 size;
|
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if (ctrl->index == 0)
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return 0;
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size = sizeof(u8) + ctrl->index; /* 8-bit address + data */
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ctrl->index = 0;
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return gc2235_i2c_write(client, size, (u8 *)&ctrl->buffer);
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}
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static int __gc2235_buf_reg_array(struct i2c_client *client,
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struct gc2235_write_ctrl *ctrl,
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const struct gc2235_reg *next)
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{
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int size;
|
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if (next->type != GC2235_8BIT)
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return -EINVAL;
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size = 1;
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ctrl->buffer.data[ctrl->index] = (u8)next->val;
|
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/* When first item is added, we need to store its starting address */
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if (ctrl->index == 0)
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ctrl->buffer.addr = next->reg;
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ctrl->index += size;
|
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/*
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* Buffer cannot guarantee free space for u32? Better flush it to avoid
|
* possible lack of memory for next item.
|
*/
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if (ctrl->index + sizeof(u8) >= GC2235_MAX_WRITE_BUF_SIZE)
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return __gc2235_flush_reg_array(client, ctrl);
|
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return 0;
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}
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static int __gc2235_write_reg_is_consecutive(struct i2c_client *client,
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struct gc2235_write_ctrl *ctrl,
|
const struct gc2235_reg *next)
|
{
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if (ctrl->index == 0)
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return 1;
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return ctrl->buffer.addr + ctrl->index == next->reg;
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}
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static int gc2235_write_reg_array(struct i2c_client *client,
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const struct gc2235_reg *reglist)
|
{
|
const struct gc2235_reg *next = reglist;
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struct gc2235_write_ctrl ctrl;
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int err;
|
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ctrl.index = 0;
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for (; next->type != GC2235_TOK_TERM; next++) {
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switch (next->type & GC2235_TOK_MASK) {
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case GC2235_TOK_DELAY:
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err = __gc2235_flush_reg_array(client, &ctrl);
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if (err)
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return err;
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msleep(next->val);
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break;
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default:
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/*
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* If next address is not consecutive, data needs to be
|
* flushed before proceed.
|
*/
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if (!__gc2235_write_reg_is_consecutive(client, &ctrl,
|
next)) {
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err = __gc2235_flush_reg_array(client, &ctrl);
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if (err)
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return err;
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}
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err = __gc2235_buf_reg_array(client, &ctrl, next);
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if (err) {
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dev_err(&client->dev, "%s: write error, aborted\n",
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__func__);
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return err;
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}
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break;
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}
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}
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return __gc2235_flush_reg_array(client, &ctrl);
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}
|
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static int gc2235_g_focal(struct v4l2_subdev *sd, s32 *val)
|
{
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*val = (GC2235_FOCAL_LENGTH_NUM << 16) | GC2235_FOCAL_LENGTH_DEM;
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return 0;
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}
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static int gc2235_g_fnumber(struct v4l2_subdev *sd, s32 *val)
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{
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/*const f number for imx*/
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*val = (GC2235_F_NUMBER_DEFAULT_NUM << 16) | GC2235_F_NUMBER_DEM;
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return 0;
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}
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static int gc2235_g_fnumber_range(struct v4l2_subdev *sd, s32 *val)
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{
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*val = (GC2235_F_NUMBER_DEFAULT_NUM << 24) |
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(GC2235_F_NUMBER_DEM << 16) |
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(GC2235_F_NUMBER_DEFAULT_NUM << 8) | GC2235_F_NUMBER_DEM;
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return 0;
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}
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static int gc2235_get_intg_factor(struct i2c_client *client,
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struct camera_mipi_info *info,
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const struct gc2235_resolution *res)
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{
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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struct gc2235_device *dev = to_gc2235_sensor(sd);
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struct atomisp_sensor_mode_data *buf = &info->data;
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u16 reg_val, reg_val_h;
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int ret;
|
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if (!info)
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return -EINVAL;
|
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/* pixel clock calculattion */
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buf->vt_pix_clk_freq_mhz = dev->vt_pix_clk_freq_mhz = 30000000;
|
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/* get integration time */
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buf->coarse_integration_time_min = GC2235_COARSE_INTG_TIME_MIN;
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buf->coarse_integration_time_max_margin =
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GC2235_COARSE_INTG_TIME_MAX_MARGIN;
|
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buf->fine_integration_time_min = GC2235_FINE_INTG_TIME_MIN;
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buf->fine_integration_time_max_margin =
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GC2235_FINE_INTG_TIME_MAX_MARGIN;
|
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buf->fine_integration_time_def = GC2235_FINE_INTG_TIME_MIN;
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buf->frame_length_lines = res->lines_per_frame;
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buf->line_length_pck = res->pixels_per_line;
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buf->read_mode = res->bin_mode;
|
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/* get the cropping and output resolution to ISP for this mode. */
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ret = gc2235_read_reg(client, GC2235_8BIT,
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GC2235_H_CROP_START_H, ®_val_h);
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ret = gc2235_read_reg(client, GC2235_8BIT,
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GC2235_H_CROP_START_L, ®_val);
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if (ret)
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return ret;
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buf->crop_horizontal_start = (reg_val_h << 8) | reg_val;
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ret = gc2235_read_reg(client, GC2235_8BIT,
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GC2235_V_CROP_START_H, ®_val_h);
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ret = gc2235_read_reg(client, GC2235_8BIT,
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GC2235_V_CROP_START_L, ®_val);
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if (ret)
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return ret;
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buf->crop_vertical_start = (reg_val_h << 8) | reg_val;
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ret = gc2235_read_reg(client, GC2235_8BIT,
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GC2235_H_OUTSIZE_H, ®_val_h);
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ret = gc2235_read_reg(client, GC2235_8BIT,
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GC2235_H_OUTSIZE_L, ®_val);
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if (ret)
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return ret;
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buf->output_width = (reg_val_h << 8) | reg_val;
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ret = gc2235_read_reg(client, GC2235_8BIT,
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GC2235_V_OUTSIZE_H, ®_val_h);
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ret = gc2235_read_reg(client, GC2235_8BIT,
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GC2235_V_OUTSIZE_L, ®_val);
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if (ret)
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return ret;
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buf->output_height = (reg_val_h << 8) | reg_val;
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buf->crop_horizontal_end = buf->crop_horizontal_start +
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buf->output_width - 1;
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buf->crop_vertical_end = buf->crop_vertical_start +
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buf->output_height - 1;
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ret = gc2235_read_reg(client, GC2235_8BIT,
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GC2235_HB_H, ®_val_h);
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ret = gc2235_read_reg(client, GC2235_8BIT,
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GC2235_HB_L, ®_val);
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if (ret)
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return ret;
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#if 0
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u16 dummy = (reg_val_h << 8) | reg_val;
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#endif
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ret = gc2235_read_reg(client, GC2235_8BIT,
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GC2235_SH_DELAY_H, ®_val_h);
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ret = gc2235_read_reg(client, GC2235_8BIT,
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GC2235_SH_DELAY_L, ®_val);
|
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#if 0
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buf->line_length_pck = buf->output_width + 16 + dummy +
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(((u16)reg_val_h << 8) | (u16)reg_val) + 4;
|
#endif
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ret = gc2235_read_reg(client, GC2235_8BIT,
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GC2235_VB_H, ®_val_h);
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ret = gc2235_read_reg(client, GC2235_8BIT,
|
GC2235_VB_L, ®_val);
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if (ret)
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return ret;
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#if 0
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buf->frame_length_lines = buf->output_height + 32 +
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(((u16)reg_val_h << 8) | (u16)reg_val);
|
#endif
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buf->binning_factor_x = res->bin_factor_x ?
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res->bin_factor_x : 1;
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buf->binning_factor_y = res->bin_factor_y ?
|
res->bin_factor_y : 1;
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return 0;
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}
|
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static long __gc2235_set_exposure(struct v4l2_subdev *sd, int coarse_itg,
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int gain, int digitgain)
|
|
{
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
u16 coarse_integration = (u16)coarse_itg;
|
int ret = 0;
|
u16 expo_coarse_h, expo_coarse_l, gain_val = 0xF0, gain_val2 = 0xF0;
|
|
expo_coarse_h = coarse_integration >> 8;
|
expo_coarse_l = coarse_integration & 0xff;
|
|
ret = gc2235_write_reg(client, GC2235_8BIT,
|
GC2235_EXPOSURE_H, expo_coarse_h);
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ret = gc2235_write_reg(client, GC2235_8BIT,
|
GC2235_EXPOSURE_L, expo_coarse_l);
|
|
if (gain <= 0x58) {
|
gain_val = 0x40;
|
gain_val2 = 0x58;
|
} else if (gain < 256) {
|
gain_val = 0x40;
|
gain_val2 = gain;
|
} else {
|
gain_val2 = 64 * gain / 256;
|
gain_val = 0xff;
|
}
|
|
ret = gc2235_write_reg(client, GC2235_8BIT,
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GC2235_GLOBAL_GAIN, (u8)gain_val);
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ret = gc2235_write_reg(client, GC2235_8BIT,
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GC2235_PRE_GAIN, (u8)gain_val2);
|
|
return ret;
|
}
|
|
static int gc2235_set_exposure(struct v4l2_subdev *sd, int exposure,
|
int gain, int digitgain)
|
{
|
struct gc2235_device *dev = to_gc2235_sensor(sd);
|
int ret;
|
|
mutex_lock(&dev->input_lock);
|
ret = __gc2235_set_exposure(sd, exposure, gain, digitgain);
|
mutex_unlock(&dev->input_lock);
|
|
return ret;
|
}
|
|
static long gc2235_s_exposure(struct v4l2_subdev *sd,
|
struct atomisp_exposure *exposure)
|
{
|
int exp = exposure->integration_time[0];
|
int gain = exposure->gain[0];
|
int digitgain = exposure->gain[1];
|
|
/* we should not accept the invalid value below. */
|
if (gain == 0) {
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
v4l2_err(client, "%s: invalid value\n", __func__);
|
return -EINVAL;
|
}
|
|
return gc2235_set_exposure(sd, exp, gain, digitgain);
|
}
|
|
static long gc2235_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
|
{
|
switch (cmd) {
|
case ATOMISP_IOC_S_EXPOSURE:
|
return gc2235_s_exposure(sd, arg);
|
default:
|
return -EINVAL;
|
}
|
return 0;
|
}
|
|
/* This returns the exposure time being used. This should only be used
|
* for filling in EXIF data, not for actual image processing.
|
*/
|
static int gc2235_q_exposure(struct v4l2_subdev *sd, s32 *value)
|
{
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
u16 reg_v, reg_v2;
|
int ret;
|
|
/* get exposure */
|
ret = gc2235_read_reg(client, GC2235_8BIT,
|
GC2235_EXPOSURE_L,
|
®_v);
|
if (ret)
|
goto err;
|
|
ret = gc2235_read_reg(client, GC2235_8BIT,
|
GC2235_EXPOSURE_H,
|
®_v2);
|
if (ret)
|
goto err;
|
|
reg_v += reg_v2 << 8;
|
|
*value = reg_v;
|
err:
|
return ret;
|
}
|
|
static int gc2235_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
|
{
|
struct gc2235_device *dev =
|
container_of(ctrl->handler, struct gc2235_device, ctrl_handler);
|
int ret = 0;
|
|
switch (ctrl->id) {
|
case V4L2_CID_EXPOSURE_ABSOLUTE:
|
ret = gc2235_q_exposure(&dev->sd, &ctrl->val);
|
break;
|
case V4L2_CID_FOCAL_ABSOLUTE:
|
ret = gc2235_g_focal(&dev->sd, &ctrl->val);
|
break;
|
case V4L2_CID_FNUMBER_ABSOLUTE:
|
ret = gc2235_g_fnumber(&dev->sd, &ctrl->val);
|
break;
|
case V4L2_CID_FNUMBER_RANGE:
|
ret = gc2235_g_fnumber_range(&dev->sd, &ctrl->val);
|
break;
|
default:
|
ret = -EINVAL;
|
}
|
|
return ret;
|
}
|
|
static const struct v4l2_ctrl_ops ctrl_ops = {
|
.g_volatile_ctrl = gc2235_g_volatile_ctrl
|
};
|
|
static struct v4l2_ctrl_config gc2235_controls[] = {
|
{
|
.ops = &ctrl_ops,
|
.id = V4L2_CID_EXPOSURE_ABSOLUTE,
|
.type = V4L2_CTRL_TYPE_INTEGER,
|
.name = "exposure",
|
.min = 0x0,
|
.max = 0xffff,
|
.step = 0x01,
|
.def = 0x00,
|
.flags = 0,
|
},
|
{
|
.ops = &ctrl_ops,
|
.id = V4L2_CID_FOCAL_ABSOLUTE,
|
.type = V4L2_CTRL_TYPE_INTEGER,
|
.name = "focal length",
|
.min = GC2235_FOCAL_LENGTH_DEFAULT,
|
.max = GC2235_FOCAL_LENGTH_DEFAULT,
|
.step = 0x01,
|
.def = GC2235_FOCAL_LENGTH_DEFAULT,
|
.flags = 0,
|
},
|
{
|
.ops = &ctrl_ops,
|
.id = V4L2_CID_FNUMBER_ABSOLUTE,
|
.type = V4L2_CTRL_TYPE_INTEGER,
|
.name = "f-number",
|
.min = GC2235_F_NUMBER_DEFAULT,
|
.max = GC2235_F_NUMBER_DEFAULT,
|
.step = 0x01,
|
.def = GC2235_F_NUMBER_DEFAULT,
|
.flags = 0,
|
},
|
{
|
.ops = &ctrl_ops,
|
.id = V4L2_CID_FNUMBER_RANGE,
|
.type = V4L2_CTRL_TYPE_INTEGER,
|
.name = "f-number range",
|
.min = GC2235_F_NUMBER_RANGE,
|
.max = GC2235_F_NUMBER_RANGE,
|
.step = 0x01,
|
.def = GC2235_F_NUMBER_RANGE,
|
.flags = 0,
|
},
|
};
|
|
static int __gc2235_init(struct v4l2_subdev *sd)
|
{
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
/* restore settings */
|
gc2235_res = gc2235_res_preview;
|
N_RES = N_RES_PREVIEW;
|
|
return gc2235_write_reg_array(client, gc2235_init_settings);
|
}
|
|
static int is_init;
|
|
static int power_ctrl(struct v4l2_subdev *sd, bool flag)
|
{
|
int ret = -1;
|
struct gc2235_device *dev = to_gc2235_sensor(sd);
|
|
if (!dev || !dev->platform_data)
|
return -ENODEV;
|
|
if (flag) {
|
ret = dev->platform_data->v1p8_ctrl(sd, 1);
|
usleep_range(60, 90);
|
if (ret == 0)
|
ret |= dev->platform_data->v2p8_ctrl(sd, 1);
|
} else {
|
ret = dev->platform_data->v1p8_ctrl(sd, 0);
|
ret |= dev->platform_data->v2p8_ctrl(sd, 0);
|
}
|
return ret;
|
}
|
|
static int gpio_ctrl(struct v4l2_subdev *sd, bool flag)
|
{
|
struct gc2235_device *dev = to_gc2235_sensor(sd);
|
int ret = -1;
|
|
if (!dev || !dev->platform_data)
|
return -ENODEV;
|
|
ret |= dev->platform_data->gpio1_ctrl(sd, !flag);
|
usleep_range(60, 90);
|
return dev->platform_data->gpio0_ctrl(sd, flag);
|
}
|
|
static int power_up(struct v4l2_subdev *sd)
|
{
|
struct gc2235_device *dev = to_gc2235_sensor(sd);
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
int ret;
|
|
if (!dev->platform_data) {
|
dev_err(&client->dev,
|
"no camera_sensor_platform_data");
|
return -ENODEV;
|
}
|
/* power control */
|
ret = power_ctrl(sd, 1);
|
if (ret)
|
goto fail_power;
|
|
/* according to DS, at least 5ms is needed between DOVDD and PWDN */
|
usleep_range(5000, 6000);
|
|
ret = dev->platform_data->flisclk_ctrl(sd, 1);
|
if (ret)
|
goto fail_clk;
|
usleep_range(5000, 6000);
|
|
/* gpio ctrl */
|
ret = gpio_ctrl(sd, 1);
|
if (ret) {
|
ret = gpio_ctrl(sd, 1);
|
if (ret)
|
goto fail_power;
|
}
|
|
msleep(5);
|
return 0;
|
|
fail_clk:
|
gpio_ctrl(sd, 0);
|
fail_power:
|
power_ctrl(sd, 0);
|
dev_err(&client->dev, "sensor power-up failed\n");
|
|
return ret;
|
}
|
|
static int power_down(struct v4l2_subdev *sd)
|
{
|
struct gc2235_device *dev = to_gc2235_sensor(sd);
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
int ret = 0;
|
|
if (!dev->platform_data) {
|
dev_err(&client->dev,
|
"no camera_sensor_platform_data");
|
return -ENODEV;
|
}
|
/* gpio ctrl */
|
ret = gpio_ctrl(sd, 0);
|
if (ret) {
|
ret = gpio_ctrl(sd, 0);
|
if (ret)
|
dev_err(&client->dev, "gpio failed 2\n");
|
}
|
|
ret = dev->platform_data->flisclk_ctrl(sd, 0);
|
if (ret)
|
dev_err(&client->dev, "flisclk failed\n");
|
|
/* power control */
|
ret = power_ctrl(sd, 0);
|
if (ret)
|
dev_err(&client->dev, "vprog failed.\n");
|
|
return ret;
|
}
|
|
static int gc2235_s_power(struct v4l2_subdev *sd, int on)
|
{
|
int ret;
|
|
if (on == 0)
|
ret = power_down(sd);
|
else {
|
ret = power_up(sd);
|
if (!ret)
|
ret = __gc2235_init(sd);
|
is_init = 1;
|
}
|
return ret;
|
}
|
|
/*
|
* distance - calculate the distance
|
* @res: resolution
|
* @w: width
|
* @h: height
|
*
|
* Get the gap between resolution and w/h.
|
* res->width/height smaller than w/h wouldn't be considered.
|
* Returns the value of gap or -1 if fail.
|
*/
|
#define LARGEST_ALLOWED_RATIO_MISMATCH 800
|
static int distance(struct gc2235_resolution *res, u32 w, u32 h)
|
{
|
unsigned int w_ratio = (res->width << 13) / w;
|
unsigned int h_ratio;
|
int match;
|
|
if (h == 0)
|
return -1;
|
h_ratio = (res->height << 13) / h;
|
if (h_ratio == 0)
|
return -1;
|
match = abs(((w_ratio << 13) / h_ratio) - 8192);
|
|
if ((w_ratio < 8192) || (h_ratio < 8192) ||
|
(match > LARGEST_ALLOWED_RATIO_MISMATCH))
|
return -1;
|
|
return w_ratio + h_ratio;
|
}
|
|
/* Return the nearest higher resolution index */
|
static int nearest_resolution_index(int w, int h)
|
{
|
int i;
|
int idx = -1;
|
int dist;
|
int min_dist = INT_MAX;
|
struct gc2235_resolution *tmp_res = NULL;
|
|
for (i = 0; i < N_RES; i++) {
|
tmp_res = &gc2235_res[i];
|
dist = distance(tmp_res, w, h);
|
if (dist == -1)
|
continue;
|
if (dist < min_dist) {
|
min_dist = dist;
|
idx = i;
|
}
|
}
|
|
return idx;
|
}
|
|
static int get_resolution_index(int w, int h)
|
{
|
int i;
|
|
for (i = 0; i < N_RES; i++) {
|
if (w != gc2235_res[i].width)
|
continue;
|
if (h != gc2235_res[i].height)
|
continue;
|
|
return i;
|
}
|
|
return -1;
|
}
|
|
static int startup(struct v4l2_subdev *sd)
|
{
|
struct gc2235_device *dev = to_gc2235_sensor(sd);
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
int ret = 0;
|
|
if (is_init == 0) {
|
/* force gc2235 to do a reset in res change, otherwise it
|
* can not output normal after switching res. and it is not
|
* necessary for first time run up after power on, for the sack
|
* of performance
|
*/
|
power_down(sd);
|
power_up(sd);
|
gc2235_write_reg_array(client, gc2235_init_settings);
|
}
|
|
ret = gc2235_write_reg_array(client, gc2235_res[dev->fmt_idx].regs);
|
if (ret) {
|
dev_err(&client->dev, "gc2235 write register err.\n");
|
return ret;
|
}
|
is_init = 0;
|
|
return ret;
|
}
|
|
static int gc2235_set_fmt(struct v4l2_subdev *sd,
|
struct v4l2_subdev_pad_config *cfg,
|
struct v4l2_subdev_format *format)
|
{
|
struct v4l2_mbus_framefmt *fmt = &format->format;
|
struct gc2235_device *dev = to_gc2235_sensor(sd);
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
struct camera_mipi_info *gc2235_info = NULL;
|
int ret = 0;
|
int idx;
|
|
gc2235_info = v4l2_get_subdev_hostdata(sd);
|
if (!gc2235_info)
|
return -EINVAL;
|
if (format->pad)
|
return -EINVAL;
|
if (!fmt)
|
return -EINVAL;
|
mutex_lock(&dev->input_lock);
|
idx = nearest_resolution_index(fmt->width, fmt->height);
|
if (idx == -1) {
|
/* return the largest resolution */
|
fmt->width = gc2235_res[N_RES - 1].width;
|
fmt->height = gc2235_res[N_RES - 1].height;
|
} else {
|
fmt->width = gc2235_res[idx].width;
|
fmt->height = gc2235_res[idx].height;
|
}
|
fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
|
if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
|
cfg->try_fmt = *fmt;
|
mutex_unlock(&dev->input_lock);
|
return 0;
|
}
|
|
dev->fmt_idx = get_resolution_index(fmt->width, fmt->height);
|
if (dev->fmt_idx == -1) {
|
dev_err(&client->dev, "get resolution fail\n");
|
mutex_unlock(&dev->input_lock);
|
return -EINVAL;
|
}
|
|
ret = startup(sd);
|
if (ret) {
|
dev_err(&client->dev, "gc2235 startup err\n");
|
goto err;
|
}
|
|
ret = gc2235_get_intg_factor(client, gc2235_info,
|
&gc2235_res[dev->fmt_idx]);
|
if (ret)
|
dev_err(&client->dev, "failed to get integration_factor\n");
|
|
err:
|
mutex_unlock(&dev->input_lock);
|
return ret;
|
}
|
|
static int gc2235_get_fmt(struct v4l2_subdev *sd,
|
struct v4l2_subdev_pad_config *cfg,
|
struct v4l2_subdev_format *format)
|
{
|
struct v4l2_mbus_framefmt *fmt = &format->format;
|
struct gc2235_device *dev = to_gc2235_sensor(sd);
|
|
if (format->pad)
|
return -EINVAL;
|
|
if (!fmt)
|
return -EINVAL;
|
|
fmt->width = gc2235_res[dev->fmt_idx].width;
|
fmt->height = gc2235_res[dev->fmt_idx].height;
|
fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
|
|
return 0;
|
}
|
|
static int gc2235_detect(struct i2c_client *client)
|
{
|
struct i2c_adapter *adapter = client->adapter;
|
u16 high, low;
|
int ret;
|
u16 id;
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
|
return -ENODEV;
|
|
ret = gc2235_read_reg(client, GC2235_8BIT,
|
GC2235_SENSOR_ID_H, &high);
|
if (ret) {
|
dev_err(&client->dev, "sensor_id_high = 0x%x\n", high);
|
return -ENODEV;
|
}
|
ret = gc2235_read_reg(client, GC2235_8BIT,
|
GC2235_SENSOR_ID_L, &low);
|
id = ((high << 8) | low);
|
|
if (id != GC2235_ID) {
|
dev_err(&client->dev, "sensor ID error, 0x%x\n", id);
|
return -ENODEV;
|
}
|
|
dev_info(&client->dev, "detect gc2235 success\n");
|
return 0;
|
}
|
|
static int gc2235_s_stream(struct v4l2_subdev *sd, int enable)
|
{
|
struct gc2235_device *dev = to_gc2235_sensor(sd);
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
int ret;
|
|
mutex_lock(&dev->input_lock);
|
|
if (enable)
|
ret = gc2235_write_reg_array(client, gc2235_stream_on);
|
else
|
ret = gc2235_write_reg_array(client, gc2235_stream_off);
|
|
mutex_unlock(&dev->input_lock);
|
return ret;
|
}
|
|
static int gc2235_s_config(struct v4l2_subdev *sd,
|
int irq, void *platform_data)
|
{
|
struct gc2235_device *dev = to_gc2235_sensor(sd);
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
int ret = 0;
|
|
if (!platform_data)
|
return -ENODEV;
|
|
dev->platform_data =
|
(struct camera_sensor_platform_data *)platform_data;
|
|
mutex_lock(&dev->input_lock);
|
/* power off the module, then power on it in future
|
* as first power on by board may not fulfill the
|
* power on sequqence needed by the module
|
*/
|
ret = power_down(sd);
|
if (ret) {
|
dev_err(&client->dev, "gc2235 power-off err.\n");
|
goto fail_power_off;
|
}
|
|
ret = power_up(sd);
|
if (ret) {
|
dev_err(&client->dev, "gc2235 power-up err.\n");
|
goto fail_power_on;
|
}
|
|
ret = dev->platform_data->csi_cfg(sd, 1);
|
if (ret)
|
goto fail_csi_cfg;
|
|
/* config & detect sensor */
|
ret = gc2235_detect(client);
|
if (ret) {
|
dev_err(&client->dev, "gc2235_detect err s_config.\n");
|
goto fail_csi_cfg;
|
}
|
|
/* turn off sensor, after probed */
|
ret = power_down(sd);
|
if (ret) {
|
dev_err(&client->dev, "gc2235 power-off err.\n");
|
goto fail_csi_cfg;
|
}
|
mutex_unlock(&dev->input_lock);
|
|
return 0;
|
|
fail_csi_cfg:
|
dev->platform_data->csi_cfg(sd, 0);
|
fail_power_on:
|
power_down(sd);
|
dev_err(&client->dev, "sensor power-gating failed\n");
|
fail_power_off:
|
mutex_unlock(&dev->input_lock);
|
return ret;
|
}
|
|
static int gc2235_g_frame_interval(struct v4l2_subdev *sd,
|
struct v4l2_subdev_frame_interval *interval)
|
{
|
struct gc2235_device *dev = to_gc2235_sensor(sd);
|
|
interval->interval.numerator = 1;
|
interval->interval.denominator = gc2235_res[dev->fmt_idx].fps;
|
|
return 0;
|
}
|
|
static int gc2235_enum_mbus_code(struct v4l2_subdev *sd,
|
struct v4l2_subdev_pad_config *cfg,
|
struct v4l2_subdev_mbus_code_enum *code)
|
{
|
if (code->index >= MAX_FMTS)
|
return -EINVAL;
|
|
code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
|
return 0;
|
}
|
|
static int gc2235_enum_frame_size(struct v4l2_subdev *sd,
|
struct v4l2_subdev_pad_config *cfg,
|
struct v4l2_subdev_frame_size_enum *fse)
|
{
|
int index = fse->index;
|
|
if (index >= N_RES)
|
return -EINVAL;
|
|
fse->min_width = gc2235_res[index].width;
|
fse->min_height = gc2235_res[index].height;
|
fse->max_width = gc2235_res[index].width;
|
fse->max_height = gc2235_res[index].height;
|
|
return 0;
|
}
|
|
static int gc2235_g_skip_frames(struct v4l2_subdev *sd, u32 *frames)
|
{
|
struct gc2235_device *dev = to_gc2235_sensor(sd);
|
|
mutex_lock(&dev->input_lock);
|
*frames = gc2235_res[dev->fmt_idx].skip_frames;
|
mutex_unlock(&dev->input_lock);
|
|
return 0;
|
}
|
|
static const struct v4l2_subdev_sensor_ops gc2235_sensor_ops = {
|
.g_skip_frames = gc2235_g_skip_frames,
|
};
|
|
static const struct v4l2_subdev_video_ops gc2235_video_ops = {
|
.s_stream = gc2235_s_stream,
|
.g_frame_interval = gc2235_g_frame_interval,
|
};
|
|
static const struct v4l2_subdev_core_ops gc2235_core_ops = {
|
.s_power = gc2235_s_power,
|
.ioctl = gc2235_ioctl,
|
};
|
|
static const struct v4l2_subdev_pad_ops gc2235_pad_ops = {
|
.enum_mbus_code = gc2235_enum_mbus_code,
|
.enum_frame_size = gc2235_enum_frame_size,
|
.get_fmt = gc2235_get_fmt,
|
.set_fmt = gc2235_set_fmt,
|
};
|
|
static const struct v4l2_subdev_ops gc2235_ops = {
|
.core = &gc2235_core_ops,
|
.video = &gc2235_video_ops,
|
.pad = &gc2235_pad_ops,
|
.sensor = &gc2235_sensor_ops,
|
};
|
|
static int gc2235_remove(struct i2c_client *client)
|
{
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
struct gc2235_device *dev = to_gc2235_sensor(sd);
|
|
dev_dbg(&client->dev, "gc2235_remove...\n");
|
|
dev->platform_data->csi_cfg(sd, 0);
|
|
v4l2_device_unregister_subdev(sd);
|
media_entity_cleanup(&dev->sd.entity);
|
v4l2_ctrl_handler_free(&dev->ctrl_handler);
|
kfree(dev);
|
|
return 0;
|
}
|
|
static int gc2235_probe(struct i2c_client *client)
|
{
|
struct gc2235_device *dev;
|
void *gcpdev;
|
int ret;
|
unsigned int i;
|
|
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
|
if (!dev)
|
return -ENOMEM;
|
|
mutex_init(&dev->input_lock);
|
|
dev->fmt_idx = 0;
|
v4l2_i2c_subdev_init(&dev->sd, client, &gc2235_ops);
|
|
gcpdev = gmin_camera_platform_data(&dev->sd,
|
ATOMISP_INPUT_FORMAT_RAW_10,
|
atomisp_bayer_order_grbg);
|
|
ret = gc2235_s_config(&dev->sd, client->irq, gcpdev);
|
if (ret)
|
goto out_free;
|
|
dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
|
dev->pad.flags = MEDIA_PAD_FL_SOURCE;
|
dev->format.code = MEDIA_BUS_FMT_SBGGR10_1X10;
|
dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
|
ret =
|
v4l2_ctrl_handler_init(&dev->ctrl_handler,
|
ARRAY_SIZE(gc2235_controls));
|
if (ret) {
|
gc2235_remove(client);
|
return ret;
|
}
|
|
for (i = 0; i < ARRAY_SIZE(gc2235_controls); i++)
|
v4l2_ctrl_new_custom(&dev->ctrl_handler, &gc2235_controls[i],
|
NULL);
|
|
if (dev->ctrl_handler.error) {
|
gc2235_remove(client);
|
return dev->ctrl_handler.error;
|
}
|
|
/* Use same lock for controls as for everything else. */
|
dev->ctrl_handler.lock = &dev->input_lock;
|
dev->sd.ctrl_handler = &dev->ctrl_handler;
|
|
ret = media_entity_pads_init(&dev->sd.entity, 1, &dev->pad);
|
if (ret)
|
gc2235_remove(client);
|
|
return atomisp_register_i2c_module(&dev->sd, gcpdev, RAW_CAMERA);
|
|
out_free:
|
v4l2_device_unregister_subdev(&dev->sd);
|
kfree(dev);
|
|
return ret;
|
}
|
|
static const struct acpi_device_id gc2235_acpi_match[] = {
|
{ "INT33F8" },
|
{},
|
};
|
MODULE_DEVICE_TABLE(acpi, gc2235_acpi_match);
|
|
static struct i2c_driver gc2235_driver = {
|
.driver = {
|
.name = "gc2235",
|
.acpi_match_table = gc2235_acpi_match,
|
},
|
.probe_new = gc2235_probe,
|
.remove = gc2235_remove,
|
};
|
module_i2c_driver(gc2235_driver);
|
|
MODULE_AUTHOR("Shuguang Gong <Shuguang.Gong@intel.com>");
|
MODULE_DESCRIPTION("A low-level driver for GC2235 sensors");
|
MODULE_LICENSE("GPL");
|
